<!
//  paintStroke.slh
//
//  Created by Sam Gondelman on 12/13/2018
//  Copyright 2018 High Fidelity, Inc.
//
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
!>

<@if not PAINTSTROKE_SLH@>
<@def PAINTSTROKE_SLH@>

<@include paintStroke_Shared.slh@>
<@include gpu/ShaderConstants.h@>

<@func declarePolyLineBuffers() @>

// Hack comment to absorb the extra '//' scribe prepends

#if !defined(GPU_SSBO_TRANSFORM_OBJECT)
LAYOUT(binding=GPU_RESOURCE_BUFFER_SLOT0_TEXTURE) uniform samplerBuffer polylineVerticesBuffer;
PolylineVertex getPolylineVertex(int i) {
    int offset = 4 * i;
    PolylineVertex vertex;
    vertex.positionAndUCoord = texelFetch(polylineVerticesBuffer, offset);
    vertex.color = texelFetch(polylineVerticesBuffer, offset + 1);
    vertex.normal = texelFetch(polylineVerticesBuffer, offset + 2);
    vertex.binormalAndHalfWidth = texelFetch(polylineVerticesBuffer, offset + 3);
    return vertex;
}
#else
LAYOUT_STD140(binding=GPU_RESOURCE_BUFFER_SLOT0_STORAGE) buffer polylineVerticesBuffer {
    PolylineVertex _vertices[];
};
PolylineVertex getPolylineVertex(int i) {
    PolylineVertex vertex = _vertices[i];
    return vertex;
}
#endif

LAYOUT_STD140(binding=0) uniform polylineDataBuffer {
    PolylineData _polylineData;
};

<@endfunc@>

<@endif@>